RU2524813C1 - Magnetic transmission - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: magnetic transmission comprises a driven shaft and a driving shaft on which driven and driving disks from magnet permeable material are respectively installed and fitted by permanent magnets set with identical pitch by the periphery. The permanent magnets of a cylinder are of trapezoid shape and are installed in trapezoid cavities made in the disk with a gap. The trapezoid permanent magnets can be set on axes. The gap cavities can be filled by lubricating liquid. The driven and driving shafts can be set parallel. The longitudinal axes of the driving and driven shafts can be coaxial.

EFFECT: transmission of greater energy without lubrication of a reducer.

5 cl, 6 dwg

Description

The invention relates to transmission mechanisms of rotational motion and can be used in couplings, gearboxes and multipliers.

Known gearboxes for the USSR AS No. 211573, containing the driving and driven gears having elements for transmitting torque (teeth), evenly placed on their side surfaces.

Disadvantages: low reliability, due to the general shortcomings of all gears, namely tooth breakage during shock loads, tooth wear, the need for lubrication.

Known magnetic clutch-reducer for the USSR AS No. 1113869, IPC H02K 49/70, publ. 09/15/1974, the Magnetic clutch gearbox contains a rotor with permanent magnets on the outer surface, a sealing cup and holder concentrically mounted with a gap relative to each other, with teeth on the inner surface, characterized in that, in order to increase reliability, it is equipped with a set permanent magnets on the teeth of the said clip and on the outer surface of the sealing glass, moreover, the magnets of the clip and glass facing each other with opposite poles, and the number of magnets on the sealing glass exceeds t is the number of magnets on the teeth by a multiple of the number of poles of the rotor magnet.

The disadvantage is the complexity of the design.

Known magnetic coupling-reducer according to the USSR AS No. 1449737, IPC F16D 27/01, publ. 09/07/1989

The clutch gearbox includes a drive shaft. A permanent magnet and a disk magnetic circuit with the number of groups of end teeth equal to the number of poles are rigidly fixed on it. Between the end teeth there is a magnetically insulated cup and a non-magnetic driven sleeve. In the glass there are longitudinal grooves that are filled with magnetically conductive material. The teeth of the sleeve are made of magnetically conductive material.

The disadvantage is the complexity of the design.

Known magnetic transmission, containing coaxially mounted drive and driven shafts, a drive element fixed to the drive shaft, made in the form of a multi-band permanent magnet, the same poles of which are located on its diametrically opposite sides, a concentric ring element of non-magnetic material with through radial grooves filled with it magnetically conductive material, and covering the last gear element, the number of teeth of which is different from the number of grooves of the annular element on The number of poles lead.

The gear element is made in the form of a permanent magnet magnetized in the radial direction, and is mounted on the driven shaft, and the ring element is fixedly mounted USSR AS No. 675233, IPC F16Y 1/06.

The disadvantages of this transmission are the limited gear ratio range and the difficulty of obtaining high gear ratios due to the need to manufacture a gear element with a significant number of teeth.

Known magnetic gear according to the patent of the Russian Federation for the invention No. 2082042, IPC F16H 1/06, publ. 06/20/1997 g, prototype.

This magnetic gearbox contains a housing in which a drive shaft with a drive element, an intermediate shaft with a gear element and an additional drive element, and a driven shaft with an additional gear element are mounted on the bearings. The main and additional ring elements are mounted motionlessly inside the housing.

Disadvantages - limitation of the transmitted power and slippage in the transmission with increasing load on the output shaft.

The objective of the invention is to provide greater power transmission without lubricating the gearbox.

The solution of these problems has been achieved in a magnetic transmission containing driven and driving shafts, on which are mounted respectively driven and driving disks of magnetically permeable material with permanent magnets installed with the same peripheral pitch, so that according to the invention the permanent magnets of at least one disk are made trapezoidal shape and installed in trapezoidal cavities made in the cylinder with a gap. Permanent trapezoidal magnets can be mounted on the axles. The cavity cavities can be filled with lubricating fluid. Leading and driven shafts can be installed in parallel. The longitudinal axis of the drive and driven shafts can be made coaxially.

The invention is illustrated in the drawing of figure 1 ... 6, where:

figure 1 shows a diagram of a magnetic transmission,

figure 2 shows the design of the gear with internal gearing,

figure 3 shows a section aa,

figure 4 and 5 shows a diagram of the installation of permanent magnets 5 with a gap,

figure 6 explains the operation of the magnetic transmission (gear).

The magnetic transmission of FIGS. 1 ... 6 comprises a driven shaft 1, on which a driven disk 2 is mounted, a drive shaft 3, on which a drive disk 4 is mounted.

The axes of the shafts 1 and 3 are either parallel, or they are made coaxially. Permanent magnets 5 are mounted on the perimeter of discs 2 and 4. Permanent magnets on at least one disc are trapezoidal, magnetized in the radial direction and mounted in cavities 6 of a trapezoidal shape with gaps 7. Permanent magnets 5 of a trapezoidal shape can be mounted on axes 8. Between the disks 2 and 4, a gap is made. Disks 2 and 4 are made of magnetically permeable material.

Permanent magnets 5 on another disk can be made and installed either trapezoidal or cylindrical in shape. The cavities of the gaps 7 may be filled with grease. Shafts 1 and 3 are mounted on bearings 9. All transmission parts are made in housing 10.

The orientation of the poles of the permanent magnets 5 in the disks 2 and 4 is opposite (Fig.6) to ensure the adhesion of the disks 2 and 4 in the absence of teeth or contact.

When the proposed magnetic transmission (Fig. 6) is used, not only one pair of permanent magnets 5, but also neighboring pairs of permanent magnets 5, which rotate opposite magnetic poles towards each other, and actively form straight lines, actively participate in the moment transfer from disk 2 to the driven disk 4 magnetic lines 11. At the same time, for remote magnets the magnetic lines do not close or their length is very large - the magnetic lines 12 do not affect the transmission. As a result, the proposed transmission can transmit a moment of 30 ... 50% more than if the permanent magnets were fixed rigidly.

Unlike gear meshing, there is no mechanical contact in the gear, this offers several advantages:

- with a sharp increase in the load on the energy consumer, the rotation of the pinion gear 1 slides relative to the driven gear 2. However, due to the absence of teeth, they do not collapse;

- there is no need to lubricate the transmission and bearings;

- soften shock loads during operation;

- increased reliability;

- increases the resource of the device;

- the device is operable under any conditions: in vacuum, for example in space, at high environmental pressure, for example under water, and in aggressive environments: acidic, alkaline and environments containing abrasive particles. This is ensured by the absolute tightness of the housing and the absence of seals on rotating parts.

The application of the invention has increased the transmitted torque.

Claims (5)

1. A magnetic transmission comprising driven and driving shafts, on which are mounted respectively driven and driving disks of magnetically permeable material with permanent magnets mounted with the same peripheral pitch, characterized in that the permanent magnets of at least one disk are made in a trapezoidal shape and installed in trapezoidal cavities made in the disc with a gap. 2. The magnetic transmission according to claim 1, characterized in that the permanent magnets of a trapezoidal shape are mounted on the axes. 3. The magnetic transmission according to claim 1 or 2, characterized in that the cavity of the gaps are filled with a lubricating fluid. 4. The magnetic transmission according to claim 1 or 2, characterized in that the drive and driven shafts are installed in parallel. 5. The magnetic transmission according to claim 1 or 2, characterized in that the longitudinal axes of the driving and driven shafts are made coaxially.

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